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CRPS is one of those diseases that depends on ruling out other conditions and then meeting certain criteria before a diagnosis is given. Most pain management doctors utilize the Budapest criteria for diagnosing CRPS:
1. Continuing pain, which is disproportionate to any inciting event
2. Must report at least one symptom in three of the four following categories:
A. Sensory: reports of hyperesthesia and/or allodynia
B. Vasomotor: reports of temperature asymmetry and/or skin color changes and/or skin color asymmetry
C. Sudomotor/edema: reports of edema and/or sweating changes and/or sweating asymmetry
D. Motor/trophic: reports of decreased range of motion and/or motor dysfunction (weakness, tremor, dystonia) and/or trophic changes (hair, nail, skin)
3. Must display at least one sign at time of evaluation in two or more of the following categories:
A. Sensory: evidence of hyperalgesia (to pinprick) and/or allodynia (to light touch and/or deep somatic pressure and/or joint movement)
B. Vasomotor: evidence of temperature asymmetry and/or skin color changes and/or asymmetry
C. Sudomotor/edema: evidence of edema and/or sweating changes and/or sweating asymmetry
D. Motor/trophic: evidence of decreased range of motion and/or motor dysfunction (weakness, tremor, dystonia) and/or trophic changes (hair, nail, skin)
4. There is no other diagnosis that better explains the signs and symptoms